例句與造句

1. The DFS 40 was flown for the first time by Heini Dittmar in 1939, shortly before Lippisch departed the DFS ( " Deutsche Forschungsanstalt f黵 Segelflug "-German Research Institute for Sailplane Flight ) to begin work at Messerschmitt.
2. The "'DFS 40 "'( originally developed as the "'Delta V "') was a tail-less research aircraft designed by Alexander Lippisch in 1937 as a follow-on to his Delta IV aircraft . In construction, the DFS was closer to a flying wing than its predecessor, and was built as an alternative to that aircraft.
3. It's difficult to find dfs 40 in a sentence. 用dfs 40造句挺難的